Gas boiler



A. A. MARKS Feb. 21, 1933.

GAS BOILER Filed oct. 24,

1928 2 Sheets-Sheet l -Fiyi/8.

A. A. MARKS Feb. 21, 1933.

GAS BOILER 2 Sheets-Sheet 2 Filed Oct. 24, 1928 ilkyilll f l I Patented Feb. 21, 1933 Unir. seres ai" .fr

ricer GAS BOILER Application filed October 24, 1928. Serial No. 314,568.

My invention is a boiler made up of a plurality of Water circulating and heat absorbing sections, which are substantially flat and spaced from one anotherl to form fines, are apertured to form a combustion chamber for the reception of a fluid-fuel burner, are enclosed Within an insulating housing preferably spaced therefrom so that products of combustion may freely circulate over the heat absorbing surfaces, and communicate with one another at their tops and bottoms.

A leading object of my invention is the avoidance or diminution of suction of Water from the boiler through the return pipe, and such desidera-ta is achieved by connecting the return pipe with a downcoiner or passage of one ofthe boiler sections at a pointsubstantially' above the bottom of the boiler and preferably adjacent to and slightly below the desiredv Water level thereof, thereby forming an inverted loop or trap With a minimum of external piping.

Afurther object of my invention is the provision of suitably formed and positioned interior baffles for stri inO from steam.

generated in the boiler and passing between or from the sections, Water or grease tending to impede circulation of steam in a heating system.

A further object of my invention is the provision of a boiler from a plurality of independent-ly heated batteries of sections supplied with fuel from a feed line having indi- .l vidual and multiple controls; the batteries being connected in tandem and housed Within a. single casing preferably of insulating material.

Further objects of my invention are the provision of a boiler having the front and sides free from Water pipe and steam pipe connections; the provision of a rear section a-'ording facilities for the admission ofreturn and supply Water and the emission of steam oiheated Water and forming an extension of and closure for the combustion chamber; and the provision of a fluid-fuel boiler which is efficient, compact, attractive` in appearance, which may be safely and readily shipped and installed as a unit, and requires a minimum of change in installation and mounted on a base provided with sliut- 6 ters controlling theadniission-of air to the combustion chamber. The Yrear section-pref#- ably has a `vertical median riser passage or passages discharging through an outlet port and downcomer passages having ports intheV top 'thereof' for the. attachmentvv of a j pre-4 heater lying abovethesections' and alsoihavfing ports in the sides thereoffor theattach-l ment of a return condensate pipe' orl pipes. The passages of therear section communi-i cate with a bottom chamber therein, which may be provided' With a port'v for the-.attach-v ment of a manifold for coupling batteries-Y of sections together. Such manifolds pref` era-bly extend to the edges of the'v batteries: 7

which they couple so that'several manifolds may be readily connected if desired and a number of batteries housedv Within a single casino'. y

rlhe characteristic features and advantages of my {improvements-Will more fully, appear from the following description and the accompanying drawings illustratingtlie application ofmy improvements to la lgas boiler of preferred type.

In the drawings, Fig. 1 is a side elevation of a boiler embodying my improvements partly in irregular section; Fig. 2lis'a' part sectional elevation of the rear or left end of the boiler shown in Fig. l; Fig. 3' is av part sectional elevation of the front or right hand end of the boilersliovvn in Fig. l; Fig. 4 is an elevation ofl an intermediateboiler section; Fig. 5 isa top plan view of,l

therear section of theboiler at the left `of Fig. 2; Fig. 6 is a transverse sectional viewof such boiler section taken on the line 6 6'V ofy Fig. 2'; Fig. 7 isV a further transverse section `taken on .the line 74-7 of Fig. 2g Fi@ 8 is a further transverse sectional' view of such section taken on the line 8 8 of Fig. 2; Fig. 9 is a top plan View of a front end section shown in Fig. 3; Fig. 10 is a transverse sectional view through such end section taken on the line 10-10 of Fig. 3; Fig. 11 is a transverse sectional View of such end section taken on the line 11-11 of Fig. 3; Fig. 12 isa further transverse sectional view of such end section taken on the line 12-12 of Fig. 3; Fig. 13 is a transverse sectional view of an intermediate section taken on the line 13-13 of Fig. 4i; Fig. 14 is a further transverse sectional view of an intermediate section taken on the line lei-14: of Fig. 4; Fig. 15 is a further transverse sectional vieuT of an intermediate section taken on the line 15-15 of Fig. 4; Fig. 16 is a horizontal sectional View of the preheater shown on top of the boiler in Figs. 1, 2 and 3; Fig. 17 is a longitudinal sectional view on the line 17-17 of Fig. 16; Fig. 1S is a transverse sectional view on the line 18-18 of Fig. 16; Fig. 19 is a transverse sectional view on the line 19-19 of Fig. 16

and Fig. 2O is a fragmentary sectional view illustrating the corrugations on the face of the steam separator baffling the exit port of the boiler.

As illustrated in the drawings, a base 1 is provided with brackets 2 for supporting manifolds 3 of slotted gas burners el, which are positioned respectively in combustion chambers 5 formed Within batteries of cast iron tubular circulating sections mounted upon the base and housed Within an insulating casing 6 containing a hinged door 7. Gas, supplied to the manifolds through a valve controlled main 8, is ignited at the burners by pilots 9 and air is supplied to the combustion chambers through the hinged shutters 10 on the base.

Each battery consists of a front section 11, a series of intermediate sections 12 somewhat similar to the front section, and a rear section 13.

The sections 11 and 12 each have a co1nbustion chamber opening 14 and slots 15 therethrough and are cast hollow so as to form chambers 16 and 17 respectively below and above the combustion chamber and passages 18` at the sides thereof connecting the chambers 16 and 17 so that the combustion chamber opening is completely Water jacketed. Passages 19, spaced by the slots 15, connect the chamber 17 with a chamber 20 containing diagonal bafiies 22 and 23. The baiile 22 is longer than and is spaced below the bottom of the baffle 23 and projects to or beyond a perpendicular dropped from the lower edge of the latter. These baiies deflect and return globules of Water entrained with steam passing from the chamber 20 to the passages 24 connecting the sections and which are formed by nipples 25 pressed into seats formed in projecting bosses 26.

The bottoms of the sections are similarly connected together and the bosses serve to space the sections, Which are also spaced from the housing 6.

The sections have between them flue passages 27 through which products of combustion pass from the combustion chamber to the space 23 vented by the hooded pipe 29. During the passage of the products of combustion through these fines, they are baiiied, and the heat absorption surfaces of the sections is in reased, by projecting fins or flanges formed on. the roar surfaces of the sections. The lowermost of the baities 30 preferably forni broken of V-shape between the lower siots and are surmounted by an inverted V-shape battle 31 between these slots. Further battles 32 in parallelism with the legs of the baille 31 extend from the outer slots tothe edges of the sections. Unbroken il-shape baiiles 33 are positioned between the upper and shorter set of slots, and spaced batlies 34C above the slots tend to further ('liiuse the heating gases and increase the travel thereof.

Laterai recesses 35 at the tops of the sections permit the passage of the rods 36 by which the sections of a battery are held together'.

The front section is furthe-r provided With rearwardly extending yoke-like top lugs l237 for the attachment of a preheater, hereinafter described, and with feet 39 containing holes for tie rods for securing the bottoms of the sections together.

Threaded holes al and 'st-2 (Fig. 9) `are tapped into top bosses on the front section 11 for thereception of a gage and regulator ist (Fig. 3) which latter acts in conunction with the thermostat motor Ll5 to regulate, through the tension members i6, (Fig. 1) the position of the gas supply valves and air shutters. y

Holes 47 are formed in the front Wall of the front section to provide for the attachment of a gage glass, and of test, blowl ofi? and drainage cocks.

The back end section communicates with the top and bottom of the adjacent intermediate section through passages or nipples similar to those previously described. Between its port connnunicating with an intermediate section and its threaded discharge port L18 (Fig. 1) there is interposed a separater or diaphragm e9 which intercepts direct flow through the greater portion of the outlet. rlhe top of the separator has a lip 50 bent toward the front and its front face is corrugated by ribs Ainclined downwardly and outwardly from a median line (Figs. 2 and 20). This separator or battle removes from the s eani any moisture entrained Y therewith which has escaped past the bafiies 22 and 23.

The outlet L13, is formed at the top of upcastf passages 1` lying' between the; down-f comer` passages 525 andseparated therefrom by diaphragms 53'and slots 5ft- The lower part of the. rear endzsectioii; 13* isrecessedin I passages 51 and'52 communicate withA a chamber 55 below the combustion chamber. Vihen a series of. batteries are operated in unison such chambers 55 ai'e connected bya pipe or manifold 56 and the'pipes 57 leadingv from the feed outlets 48 areconnected to a main 58. yThe manifolds are preferably sov formed as to extend to the edges of two or morecoupled batteries so that several manifolds may be coupled by nipples toassemble any desiredfnumberV of batteries withiny a single casing..

Threaded return inlet ports '59 are tapped through bosses into the passages just below the normal water. level when t-he boiler is used as a steam generator, anda loop or loops 59a of the return pipe is connected to one or more of such ports, preferably the outer ports of the assembly.

The unused ports are, of course, plugged and the bottom of the loop preferably eX- tends to the bottom of the section, and pi'events or minimizes exhaustion of water from the boiler as a result of suction due to condensation and trapping in the system.

Ports G0 are tapped in bosses on the top of the section 13 for the attachment thereto of a preheater shown in Figs. 16-19. The preheater consists of a. casing 6l havingA an inlet port 62 communicating with passages 63 spaced from one another by a flue 64; and discharging to parallel passages 65 from which they are spaced by :tlues 66. The passages 65 communicate through ports 67 with the ports 60 to supply water to the tops of the downcomers 52. The preheatei casing is provided with slotted feet 68 for attachment to the lugs 37 and with apertured feet 69 for attachment to lugs 70 on the section 13. The latter is also provided with apertured feet 7l and with lugs 73 for the attachment of the tie rods 36 and 40.

A boiler so constructed may be housed within a casing formed of uncut sheets on three sides and the back formed symmetrically in two pieces as shown in Fig. 2 and which are readily detachable without disturbing the piping.

Having described my invention, I claim:

1. A boiler comprising a battery of circulating and heat absorbing sections, one of said sections having a return inlet port above the bot-tom thereof and adjacent to thenormal Water line of the boiler said'last named section having a passage discharging fluid admitted through said port to the bottoni of. said; sectionl anda vertical.,passage-.com-A municating with the bottom of.' said; section and with the upper part of a-n adjacent section. Y

2. A boiler comprising .abatteryf of cir: culating andheat absorbing sections; housed within anV insulating casingone of said sec'- tions having a poit above the bottom thereof and adjacent to the normaly water line of. theboiler, said section containing; a passageconnecting saidv port with. the bottom.

of saidr section, anda condensate return pipe connected with said port, extending through said casing Vand toward the bot-tom of said. boiler. Y

3. A. boiler comprising a battery ofcii'- culatiiig `and heat absorbing sections, one

of said sections having an inletfport above the bottom thereof and containing apassage connecting said inlet port with the bottom of said section, said section also having anv outlet port above the level of said inlet port and a separate passage connecting said out# let port with the bottom ofsaid section.

4. A boiler comprising a batteryv of circulating and heat absorbing sections, one of said sections having a plurality of inletports adjacent to the normal water level ofthe boiler and. at the sides ofV said section, said section containingpassa'ges connecting said. ports with the bottom of said sect-ion,

said section also containing'an outlet porti; above the level of said inlet ports-and a passage connecting said outlet' port' with'y the bottomy ofsaid section andlying between said pass'agesiirst'named;

5. A boiler comprising a battery ofcirculating and heat absorbing sections, one of said sections containing downcastwater circulating; passages at thesides thereof, said passagesliaving ports communicating there-- with yat the topsA and intermediate thev ends of saidipassages,l and a water circulatingfupcast` passage between said first/named passages, said passagescommunicating with one another at the,l bottom of said sectioii,-and

said upcast passage communicatingk with the4 inte 1ior of an adjacent: water circulating section at the upper part thereof.

- A boiler comprising abattery of'circulat-ing andV heat absorbing sections, one of said sections having a plurality of substan tially parallel passages therein communicating witli'one another only at the lower por.-

tions thereof, passages aforesaid having ports communicating therewith at the top of said. sect-ion and through the side'of'A saidV section vabovethe bottoms of said passages.

7. A boiler comprising a battery of circulating and heat absorbing sections, one of said sections containing a plurality` of sub'- stantially l with one another only at the bottoms there-v of, one of said passages having a port com` municating therewith through the'top 0f parallel passages communicating icc 4municating with the bottom only of thev said section, one of lsaid passages having a port communicating therewith to the side of said section above the bottom of said passage, and the other of said passages having an outlet port communicating therewith through the side of said section between the levels of said first and second named ports.

8. A boiler comprising a plurality ofcirculating and heat absorbing sections, one of said sections having Van outlet port and a. baffle having a corrugated vertical detraining` surface shielding said port to detrain water from steam passing to said port.

9. A boiler comprising a battery of circulating and heat absorbing sections, one of said sections having an outlet port, a baffle having a corrugated vertical detraining suri'ace shielding said port and having a substantially 'horizontal lip projecting toward the adjacent batterysection.

10. A boiler comprisino' a battery of circulating and heat -absor ing sections, one of said sections having an outlet port and a balile having a vertical detraining surface with an unobstructed downward discharge and shielding` said port and having a diagonally serrated face.

11. A boiler comprising a plurality of independently heated batteries of circulating and heat absorbing sections, means forming passages connecting the tops of said sections, a fuel supply line supplying fuel to said batteries and having individual and multiple controls, said batteries being connected in tandem and housed within an insulating casing.

12.,A boiler comprising a battery of circulating and heat absorbing tubular sections housed within a casing and consisting of a front section having ports for the attachment of instruments thereto and containin an aperture in the lower portion thereof, similar lintermediate sections containing apertures in the lower portions thereof forming a water jaclreted combustion chamber, and a rear section having therein fluid inlet and outlet port-s, one of said ports coniadjacent intermediate section and another of said ports communicating with the top and bottom of said adjacent intermediate section. Y i

13. A boiler comprising `a battery of heat absorbing tubular sections including an end section containing a plurality of passages one of which communicates with the top and bottom` of the adjacent battery section and another of which communicates with the bottom of said irst named passage and with the bottom oi the adjacent section, said end section having' inlet and outlet ports communicating' with said passages above the point at which such passages communicate with one another, and an inlet pipe communicating with said inlet port and projecting toward the bottom'of said end section.

14. A boiler comprising an insulating housing containing a battery of tubular circulating and heat' absorbing sections Vcontaining apertures forming a Vcombustion chamber7 one of said sections being recessed and forming an extension of and Vclosure for said combustion chamber, said sections being spaced to provide air inlet passages at the bottom of said combustion chamber and lines for discharging products of combustion from said combustion chamber, shutters on said housing controlling the flow of air to said passages7 said recessed ond section having an inlet port above the bottom thereof, an inlet port through the top thereof and an outlet port between the levels of said inlet ports; each of said sections having means for detraining water from steam passing therefrom and the section opposite said recessed section having ports for the attachment of instruments thereto.

In testimony whereof I have hereunto set my hand this 19 day of Oct. 1928.

A. A. MARKS. 

